Chen Liang created HDFS-11906:
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Summary: Add log for NameNode#monitorHealth
Key: HDFS-11906
URL: https://issues.apache.org/jira/browse/HDFS-11906
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Chen Liang
Assignee: Chen Liang
Priority: Minor
We've seen cases where NN had long delays that we suspect were due to
{{NameNode#monitorHealth}} was spending too much time on
{{getNamesystem().checkAvailableResources();}}. However due to the lack of
logging, it can be hard to verify. This JIRA tries to add some log to this
function, that display the actual time spent.
Thanks [~arpitagarwal] for the offline discussion.
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